SKU: 50871066226

SpeedFactory Billet B-Series Breather Port Plug

$27.40 $30.44
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Ships within 48 hours · Estimated delivery Sep 19 - Sep 24

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Description

SpeedFactory Billet B-Series Breather Port PlugThe SpeedFactory Billet B Series Breather Port Plug was designed specifically for use on Honda Acura B Series engines to block off the OEM "black box" breather port. This allows you to utilize the (2) M28 threaded holes on the back of the engine block for your aftermarket oil catch can breather system, resulting in the proper crankcase ventilation your high performance engine needs. Precision CNC machined from 6061 T6 billet aluminum Black Anodized

The SpeedFactory Billet B-Series Breather Port Plug was designed specifically for use on Honda/Acura B-Series engines to block off the OEM "black box" breather port.

This allows you to utilize the (2) M28 threaded holes on the back of the engine block for your aftermarket oil catch can/breather system, resulting in the proper crankcase ventilation your high performance engine needs.

  • Precision CNC machined from 6061-T6 billet aluminum
  • Black Anodized finish adds durability and eliminates corrosion
  • Dual O-rings for a tight, leak free seal
  • Laser-etched SpeedFactory “SF” logo

Installation Notes: We recommend thoroughly cleaning the port in the block and the plug with brake parts cleaner prior to installation, and then liberally coating it with HondaBond or Permatex Ultra Grey and allowing it to cure for 24hrs before use. This will act both as lubricant to facilitate installation and then will setup and bond the plug into the block so that it does not blow out in the case of abnormally high crankcase pressures such as during the event of a piston failure.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 50871066226

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4.2 ★★★★★
Based on 18 reviews
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M
Verified Purchase
Metalcastr
Louisville, US
★★★★★ 4
Works ok, but not perfect. Manage expectations.
Size: 7.5" x 8.7" x 1.4"
My goal was to reduce or eliminate bad particulate odors coming in from outside while driving, as drive through areas with high particulate pollution. Sure, recirc mode exists, but then cars fill up with CO2 quickly, and high concentrations of CO2 makes you drowsy and have slow reaction times, etc. So I looked into better cabin air filters. My Subaru has an easy-to-access cabin air filter. I learned how to properly change it via online videos, because the dealership wants over $50 just to change the filter, and it only takes a few minutes! The OEM filter I took out is not that good, and only meant for larger particulates, to protect the HVAC system. It reminded me of the cheaper (but not cheapest) furnace air handler filters. Placing this new filter in and testing it, it does block more airflow, which is to be expected from a finer filter. My car's blower has 7 running speeds (plus off), and I needed to turn it up one notch higher to get about the same airflow, versus the previous filter. The filter seems to work, somewhat. If behind a diesel truck, I still smell it. Same with cigarette smoke from a car in front. It doesn't block vape vapors at all, it seems. However, maybe I was expecting too much. The infographic for this filter clearly shows the size of particulate it can handle, which I appreciate very much. Diesel exhaust is a very fine particulate, smaller than this filter can filter. I also wonder if outside air is getting around the filter in the filter housing, since it just slides in, like a furnace air handler filter. It has a good fit though, in my car at least. What I need is an even finer filter, but that would likely block a lot more airflow. There are various manufacturers of high-end cabin air filters, but I don't know if they match or exceed the quality of this one.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 10, 2025
D
Verified Purchase
Deidra Richards
Massapequa, US
★★★★★ 5
Good as OEM
Size: 7.5" x 8.7" x 1.4"
2024 Sub Crostrek, it fit great. I was so worried, that I need to get the OEM filter, but I went with this instead. Today as I installed the new filter, it looks as good or better than the original. I get that there's more to it than looks, but the quality of the look and feel appear to be matching that of the original, perhaps i might suggest it's even better.
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Reviewed in the United States on March 28, 2026
J
Verified Purchase
Josh
Cuba, US
★★★★★ 5
Great cabin filter at a super price.
Size: 7.5" x 8.7" x 1.4"
I trust Bosch for car parts, and for the price and ease of installation, I'd take it over the Subaru OEM part any day. This is an easy replacement that the dealer would charge x4 the price to do.
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Reviewed in the United States on March 26, 2026
R
Verified Purchase
Rudy
Draper, US
★★★★★ 5
Fits 2021 RAV4 TRD
Size: 7.5" x 8.7" x 1.4"
Best fitting filter I’ve bought from Amazon. it doesn’t have any bends or creases from being put in. Fits like a glove
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 4, 2026
E
Verified Purchase
Edward
Fort Morgan, US
★★★★★ 5
Just not right.
Color: Blue
Well this is a crazy situation it says it fit my car so I bought it think it was different from any others so I tried it. It DOES NOT fit a 2008 impala. It is not wide enough one way but to deep the other, even if rotated. I even tried over and over but it did work.
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Reviewed in the United States on August 24, 2025

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